Charging Concerns - Ford Electric Ranger 1998 Student Manual

1998 Ranger EV New Model Training

CHARGING CONCERNS

The Power Control Station (PCS) recharges the traction battery.
Under normal conditions all the driver has to do is plug the vehicle
into the PCS, and the vehicle batteries will automatically be
recharged.
If the PCS is connected to the vehicle and the green start button on the
PCS is flashing, the vehicle is not charging.
Certain conditions may result in a failure of the recharging system.
Let's look at some of the things that may cause a failure.
Determining the Source of a Charging Concern
The first thing that must be considered when diagnosing a charging
concern is to determine if the cause is a failure of the charging system,
or if it is the result of a Battery Control Module (BCM) strategy.
The BCM strategy is to prevent charging if:
•
The battery is too hot or cold, as determined by signals sent from
the four battery pack temperature sensors to the BCM. Each sensor
monitors the temperature of the batteries in a certain region of the
pack, and transmits this information to the BCM. If the indicated
temperature is above 60°C (141ºF) or below -5° C (23ºF), BCM
strategy will prevent charging of the battery pack.
•
The BCM loses the ability to monitor the voltage of more than five
battery modules, it will prevent the battery pack from charging.
•
The state of charge of the battery is 99% or above, the BCM
prevents charging voltage from reaching the pack.
•
There is a difference of 30°C (86ºF) between any of the battery
pack temperature sensors, the BCM strategy will prevent charging
of the battery pack.
LESSON 5: DIAGNOSIS
5-17